1
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Chen X, Jin L, Wang Y, Yang H, Le Z, Xie Z. Synthesis of fused quinazolinones via visible light induced cyclization of 2-aminobenzaldehydes with tetrahydroisoquinolines. Org Biomol Chem 2023; 21:3863-3870. [PMID: 37093566 DOI: 10.1039/d3ob00198a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2023]
Abstract
This study reports a novel method for the synthesis of fused quinazolinones by visible-light-induced cyclization of 2-aminobenzaldehydes and tetrahydroisoquinolines. The reaction is easily carried out by irradiation with a blue LED in the presence of 9-fluorenone and air. A broad substrate scope with good tolerance of functionalities was observed under the optimized reaction conditions. Moreover, using 2-aminophenone as the substrate and under similar reaction conditions, the same product was obtained when a carbon was removed. The bio-active naturally occurring alkaloid rutaecarpine could be obtained by this strategy. The success of the reaction on the gram-scale and the further transformation of the substrate demonstrated the synthetic practicability of this reaction.
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Affiliation(s)
- Xuehua Chen
- Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang 330013, Jiangxi, China.
| | - Liang Jin
- Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang 330013, Jiangxi, China.
| | - Yihong Wang
- Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang 330013, Jiangxi, China.
| | - Hong Yang
- Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang 330013, Jiangxi, China.
| | - Zhanggao Le
- Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang 330013, Jiangxi, China.
| | - Zongbo Xie
- Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang 330013, Jiangxi, China.
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2
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Zhang YW, Jia YL, Wang D, Chen J, Liu FL, Cheng LQ, Yu X. NaIO4-Mediated Oxidative Cleavage of C–N Bond of Aza-Bridged Pyridoazepines to γLactams. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2022. [DOI: 10.1134/s107042802210013x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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3
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Egorov IN, Santra S, Zyryanov GV, Majee A, Hajra A, Chupakhin ON. Direct Asymmetric Addition of Heteroatom Nucleophiles to Imines. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ilya N. Egorov
- Department of Organic & Biomolecular Chemistry Chemical Engineering Institute Ural Federal University Mira St. 19 Ekaterinburg 620002 Russian Federation
| | - Sougata Santra
- Department of Organic & Biomolecular Chemistry Chemical Engineering Institute Ural Federal University Mira St. 19 Ekaterinburg 620002 Russian Federation
| | - Grigory V. Zyryanov
- Department of Organic & Biomolecular Chemistry Chemical Engineering Institute Ural Federal University Mira St. 19 Ekaterinburg 620002 Russian Federation
- Postovsky Institute of Organic Synthesis of RAS (Ural Division) 22/20, S. Kovalevskoy/Akademicheskaya St. 620990 Yekaterinburg Russian Federation
| | - Adinath Majee
- Department of Chemistry Visva-Bharati (A Central University) Santiniketan 731235 India
| | - Alakananda Hajra
- Department of Chemistry Visva-Bharati (A Central University) Santiniketan 731235 India
| | - Oleg N. Chupakhin
- Department of Organic & Biomolecular Chemistry Chemical Engineering Institute Ural Federal University Mira St. 19 Ekaterinburg 620002 Russian Federation
- Postovsky Institute of Organic Synthesis of RAS (Ural Division) 22/20, S. Kovalevskoy/Akademicheskaya St. 620990 Yekaterinburg Russian Federation
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4
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Abstract
This review deals with the synthesis of naturally occurring alkaloids containing partially or completely saturated pyrimidine nuclei. The interest in these compounds is associated with their structural diversity, high biological activity and toxicity. The review is divided into four parts, each of which describes a number of synthetic methodologies toward structurally different naturally occurring alkaloids containing saturated cyclic six-membered amidine, guanidine, aminal and urea (thiourea) moieties, respectively. The development of various synthetic strategies for the preparation of these compounds has remarkably increased during the past few decades. This is primarily due to the fact that some of these compounds are isolated only in limited quantities, which makes it practically impossible to study their full structural characteristics and biological activity.
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5
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Ly D, Nguyen TT, Tran CTH, Nguyen VPT, Nguyen KX, Pham PH, Le NTH, Nguyen TT, Phan NTS. Metal-Free Annulation of 2-Nitrobenzyl Alcohols and Tetrahydroisoquinolines toward the Divergent Synthesis of Quinazolinones and Quinazolinethiones. J Org Chem 2021; 87:103-113. [PMID: 34918926 DOI: 10.1021/acs.joc.1c02017] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A simple metal-free method for the synthesis of quinazolinones from commercially available 2-nitrobenzyl alcohols and tetrahydroisoquinolines is developed. The reaction conditions were tolerant of an array of functionalities such as halogen, tertiary amine, protected alcohol, and ester groups. Under nearly identical conditions, quinazolinethiones were obtained in the presence of elemental sulfur and suitable mediators.
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Affiliation(s)
- Duc Ly
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 700000, Vietnam.,Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 700000, Vietnam
| | - Thao T Nguyen
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 700000, Vietnam.,Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 700000, Vietnam
| | - Cam T H Tran
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 700000, Vietnam.,Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 700000, Vietnam
| | - Vy P T Nguyen
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 700000, Vietnam.,Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 700000, Vietnam
| | - Khang X Nguyen
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 700000, Vietnam.,Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 700000, Vietnam
| | - Phuc H Pham
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 700000, Vietnam.,Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 700000, Vietnam
| | - Nhan T H Le
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 700000, Vietnam.,Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 700000, Vietnam
| | - Tung T Nguyen
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 700000, Vietnam.,Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 700000, Vietnam
| | - Nam T S Phan
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 700000, Vietnam.,Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 700000, Vietnam
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6
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Chen W, Seidel D. Condensation-Based Methods for the C-H Bond Functionalization of Amines. SYNTHESIS-STUTTGART 2021; 53:3869-3908. [PMID: 35422533 PMCID: PMC9004714 DOI: 10.1055/a-1631-2140] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
This review aims to provide a comprehensive overview of condensation-based methods for the C-H bond functionalization of amines that feature azomethine ylides as key intermediates. These transformations are typically redox-neutral and share common attributes with classic name reactions such as the Strecker, Mannich, Friedel-Crafts, Pictet-Spengler, and Kabachnik-Fields reaction, while incorporating a redox-isomerization step. This approach provides an ideal platform to rapidly transform simple starting materials into complex amines.
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Affiliation(s)
- Weijie Chen
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
- School of Chemical Science and Engineering, Institute for Advanced Study, Tongji University, 1239 Siping Rd, Shanghai, 200092, P. R. China
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
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7
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Yang Z, Shan Y, Yu J, Pan C. Metal‐Free Hydroxyalkylative Radical Addition/Cyclization of Unactivated Alkenes for the Synthesis of Hydroxyalkylated Ring‐Fused Quinazolinones. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101142] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Zixian Yang
- School of Petrochemical Engineering Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology Changzhou University 213164 Changzhou P. R. China
| | - Yujia Shan
- School of Petrochemical Engineering Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology Changzhou University 213164 Changzhou P. R. China
| | - Jin‐Tao Yu
- School of Petrochemical Engineering Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology Changzhou University 213164 Changzhou P. R. China
| | - Changduo Pan
- School of Chemical and Environmental Engineering Jiangsu University of Technology 213001 Changzhou P. R. China
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8
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Nguyen TT, Nguyen KX, Pham PH, Ly D, Nguyen DK, Nguyen KD, Nguyen TT, Phan NTS. Copper-catalyzed synthesis of pyrido-fused quinazolinones from 2-aminoarylmethanols and isoquinolines or tetrahydroisoquinolines. Org Biomol Chem 2021; 19:4726-4732. [PMID: 33969845 DOI: 10.1039/d1ob00229e] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Pyrido-fused quinazolinones were synthesized via copper-catalyzed cascade C(sp2)-H amination and annulation of 2-aminoarylmethanols with isoquinolines or pyridines. The transformation proceeded readily in the presence of a commercially available CuCl2 catalyst with molecular oxygen as a green oxidant. Moreover, the dehydrogenative cross-coupling of 2-aminoarylmethanols with tetrahydroisoquinolines was explored, in which CuBr exhibited higher catalytic activity than CuCl2. Broad substrate scope with good tolerance of functionalities was observed under the optimized reaction conditions. The bioactive naturally occurring alkaloid rutaecarpine could be obtained by this strategy. The remarkable feature of this protocol is that complicated heterocyclic structures are readily achieved in a single synthetic step from easily accessible reactants and catalysts. This pathway to pyrido-fused quinazolinones would be complementary to existing protocols.
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Affiliation(s)
- Thao T Nguyen
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, Vietnam. and Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
| | - Khang X Nguyen
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, Vietnam. and Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
| | - Phuc H Pham
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, Vietnam. and Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
| | - Duc Ly
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, Vietnam. and Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
| | - Duyen K Nguyen
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, Vietnam. and Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
| | - Khoa D Nguyen
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, Vietnam. and Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
| | - Tung T Nguyen
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, Vietnam. and Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
| | - Nam T S Phan
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, Vietnam. and Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
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9
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Kazemi E, Darehkordi A, Abbasi A. Friedel-Crafts synthesis of bis(trifluoromethylated)-4-aryl-3,4-dihydroquinazolines, bis(trifluoromethylated)-3,4-dihydroquinazoline-4-ols and trifluoromethyl arylketoimines using N-aryltrifluoroacetimidoyl chlorides and benzene derivatives. Mol Divers 2021; 26:815-825. [PMID: 33534024 DOI: 10.1007/s11030-021-10189-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Accepted: 01/21/2021] [Indexed: 11/29/2022]
Abstract
A simple and straightforward approach to access biologically important N-heterocycles, namely bis(trifluoromethylated)-4-aryl-3,4-dihydroquinazolines, bis(trifluoromethylated)-3,4-dihydroquinazoline-4-ols and trifluoromethyl arylketoimines, as a group of important frameworks or initial substance from N-aryltrifluoroacetimidoyl chlorides with benzene derivatives via Friedel-Crafts reaction has been described. This novel strategy provides synthesis of trifluoromethylated dihydroquinazolines and trifluoromethyl arylketoimines in good to excellent yields.
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Affiliation(s)
- Elham Kazemi
- Department of Chemistry, Faculty of Science, Vali-e-Asr University of Rafsanja, Rafsanjan, 77176, Iran
| | - Ali Darehkordi
- Department of Chemistry, Faculty of Science, Vali-e-Asr University of Rafsanja, Rafsanjan, 77176, Iran.
| | - Alireza Abbasi
- School of Chemistry, College of Science, University of Tehran, P.O. Box 14155-6455, Tehran, Iran
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10
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Wu JY, Liao WJ, Lin XY, Liang CF. A facile access to N-sulfonylthioimidates and their use for the transformation to 3,4-dihydroquinazolines. Org Biomol Chem 2020; 18:8881-8885. [PMID: 33107883 DOI: 10.1039/d0ob01963a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
N-Sulfonylthioimidates can be efficiently synthesized through one-pot three-component coupling of terminal alkynes, sulfonyl azides, and thiols by using a copper(i) catalyst in the presence of 4-dimethylaminopyridine. The proposed reaction is characterized by mild reaction conditions and tolerance of diverse functional groups. Additionally, the crucial pharmacophore of 3,4-dihydroquinazolines was synthesized using a one-pot synthetic strategy from N-sulfonylthioimidates.
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Affiliation(s)
- Jia-Yu Wu
- Department of Chemistry, National Chung Hsing University, Taichung, 402, Taiwan.
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11
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Wang X, Shang S, Tian Q, Wang Y, Wu H, Li Z, Zhou S, Liu H, Dai Z, Luo W, Li D, Xiao X, Wang S, Yuan J. Imidazolium chloride as an additive for synthesis of 4(3H)-quinazolinones using anthranilamides and DMF derivatives. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131480] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Afanasyev OI, Podyacheva E, Rudenko A, Tsygankov AA, Makarova M, Chusov D. Redox Condensations of o-Nitrobenzaldehydes with Amines under Mild Conditions: Total Synthesis of the Vasicinone Family. J Org Chem 2020; 85:9347-9360. [PMID: 32515592 DOI: 10.1021/acs.joc.0c00794] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A total synthesis of the vasicinone family of natural products from bulk chemicals was developed. Reductive condensation of o-nitrobenzaldehydes with amines utilizing iron pentacarbonyl as a reducing agent followed by subsequent oxidation leads to a great variety of polycyclic nitrogen-containing heterocycles under mild conditions. Enantiomerically pure vasicinone, rutaecarpine, isaindigotone, and luotonin were synthesized from readily available starting materials like hydroxyproline, nitrobenzaldehyde, pyrrolidine, and piperidine in two to four operational steps without chromatography. The antifungal activity of all products was tested.
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Affiliation(s)
- Oleg I Afanasyev
- A.N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences, Vavilova St. 28, Moscow 119991, Russian Federation
| | - Evgeniya Podyacheva
- A.N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences, Vavilova St. 28, Moscow 119991, Russian Federation
| | - Alexander Rudenko
- Higher Chemical College, Dmitry Mendeleev University of Chemical Technology of Russia, Miusskaya sq. 9, Moscow 125047, Russian Federation
| | - Alexey A Tsygankov
- A.N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences, Vavilova St. 28, Moscow 119991, Russian Federation
| | - Maria Makarova
- A.N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences, Vavilova St. 28, Moscow 119991, Russian Federation.,Higher Chemical College, Dmitry Mendeleev University of Chemical Technology of Russia, Miusskaya sq. 9, Moscow 125047, Russian Federation
| | - Denis Chusov
- A.N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences, Vavilova St. 28, Moscow 119991, Russian Federation.,G.V. Plekhanov Russian University of Economics, 36 Stremyanny Per., Moscow 117997, Russia
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13
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Elmuradov B, Dräger G, Butenschön H. Novel π‐Extended Quinazoline‐Ferrocene Conjugates: Synthesis, Structure, and Redox Behavior. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000414] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Burkhon Elmuradov
- Institut für Organische Chemie Leibniz Universität Hannover Schneiderberg 1B 30167 Hannover Germany
- Institute of the Chemistry of Plant Substances Academy of Sciences of Uzbekistan Mirzo‐Ulugbek str. 77 100170 Tashkent Uzbekistan
| | - Gerald Dräger
- Institut für Organische Chemie Leibniz Universität Hannover Schneiderberg 1B 30167 Hannover Germany
| | - Holger Butenschön
- Institut für Organische Chemie Leibniz Universität Hannover Schneiderberg 1B 30167 Hannover Germany
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14
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Chen X, Zhang X, Lu S, Sun P. Electrosynthesis of polycyclic quinazolinones and rutaecarpine from isatoic anhydrides and cyclic amines. RSC Adv 2020; 10:44382-44386. [PMID: 35517151 PMCID: PMC9058480 DOI: 10.1039/d0ra09382c] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 11/30/2020] [Indexed: 12/14/2022] Open
Abstract
A direct decarboxylative cyclization between readily available isatoic anhydrides and cyclic amines was established to construct polycyclic fused quinazolinones employing electrochemical methods. This procedure was performed in an undivided cell without the use of a transition-metal-catalyst and external oxidant. A broad scope of polycyclic fused quinazolinones were obtained in moderate to good yields. Additionally, rutaecarpine was also prepared through our method in one step in good yield. Polycyclic quinazolinones and rutaecarpine were synthesized from isatoic anhydrides and cyclic amines through an electrochemical method without an external oxidant and transition-metal-catalyst.![]()
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Affiliation(s)
- Xingyu Chen
- Institute of Chinese Meteria Medica
- Artermisinin Research Center
- Academy of Chinese Medical Sciences
- Beijing
- P. R. China
| | - Xing Zhang
- Institute of Chinese Meteria Medica
- Artermisinin Research Center
- Academy of Chinese Medical Sciences
- Beijing
- P. R. China
| | - Sixian Lu
- Institute of Chinese Meteria Medica
- Artermisinin Research Center
- Academy of Chinese Medical Sciences
- Beijing
- P. R. China
| | - Peng Sun
- Institute of Chinese Meteria Medica
- Artermisinin Research Center
- Academy of Chinese Medical Sciences
- Beijing
- P. R. China
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15
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Hu F, Cui X, Ban Z, Lu G, Luo N, Huang G. Synthesis of quinazolin-4(1H)-ones via amination and annulation of amidines and benzamides. Org Biomol Chem 2019; 17:2356-2360. [PMID: 30758386 DOI: 10.1039/c9ob00020h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Quinazolinones have broad applications in the biological, pharmaceutical and material fields. Studies on the synthesis of these compounds are therefore widely conducted. Herein, a novel and highly efficient copper-mediated tandem C(sp2)-H amination and annulation of benzamides and amidines for the synthesis of quinazolin-4(1H)-ones is proposed. This synthetic route can be useful for the construction of quinazolin-4(1H)-one frameworks.
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Affiliation(s)
- Fangpeng Hu
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Department of Chemistry, Lanzhou University, Lanzhou 730000, China.
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16
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Gruber N, Díaz JE, Orelli LR. Synthesis of dihydroquinazolines from 2-aminobenzylamine: N 3 -aryl derivatives with electron-withdrawing groups. Beilstein J Org Chem 2018; 14:2510-2519. [PMID: 30344774 PMCID: PMC6178284 DOI: 10.3762/bjoc.14.227] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Accepted: 08/31/2018] [Indexed: 11/23/2022] Open
Abstract
The sequential N-functionalization of 2-aminobenzylamine (2-ABA) followed by cyclodehydration allowed for a straightforward and efficient synthesis of 3,4-dihydroquinazolines with N-aryl substituents bearing electron-withdrawing groups. The sequence involves an initial SNAr displacement, N-acylation and MW-assisted ring closure. Remarkably, the uncatalyzed N-arylation of 2-ABA led to the monosubstitution product using equimolar amounts of both reagents. The individual steps were optimized achieving good to excellent overall yields of the desired heterocycles, avoiding additional protection and deprotection steps. A mechanistic interpretation for the cyclodehydration reaction promoted by trimethylsilyl polyphosphate (PPSE) is also proposed on the basis of literature data and our experimental observations.
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Affiliation(s)
- Nadia Gruber
- Universidad de Buenos Aires, CONICET, Departamento de Química Orgánica, Facultad de Farmacia y Bioquímica, Junín 956, (1113) Buenos Aires, Argentina
| | - Jimena E Díaz
- Universidad de Buenos Aires, CONICET, Departamento de Química Orgánica, Facultad de Farmacia y Bioquímica, Junín 956, (1113) Buenos Aires, Argentina
| | - Liliana R Orelli
- Universidad de Buenos Aires, CONICET, Departamento de Química Orgánica, Facultad de Farmacia y Bioquímica, Junín 956, (1113) Buenos Aires, Argentina
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17
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Liu J, Zou J, Yao J, Chen G. Copper-Mediated Tandem C(sp
2
)-H Amination and Annulation of Arenes with 2-Aminopyridines: Synthesis of Pyrido-fused Quinazolinone Derivatives. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201701286] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jidan Liu
- School of Chemistry and Chemical Engineering; Guangzhou University; Guangzhou 510006 People's Republic of China
| | - Jinhui Zou
- School of Chemistry and Chemical Engineering; Guangzhou University; Guangzhou 510006 People's Republic of China
| | - Jiawei Yao
- School of Chemistry and Chemical Engineering; Guangzhou University; Guangzhou 510006 People's Republic of China
| | - Guoshu Chen
- School of Chemistry and Chemical Engineering; Guangzhou University; Guangzhou 510006 People's Republic of China
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18
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Meng X, Du Y, Zhang Q, Yu A, Zhang Y, Jia J, Liu X. Direct Functionalization of Azepane via Azomethine Ylides: A Highly Efficient Synthesis of Spirooxindoles Bearing a 1-Azabicyclo[5.3.0]decane Moiety. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700384] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Xiangtai Meng
- Department Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion; School of Chemistry&Chemical Engineering; Tianjin University of Technology; Tianjin 300384 P. R. China
| | - Yanlong Du
- Department Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion; School of Chemistry&Chemical Engineering; Tianjin University of Technology; Tianjin 300384 P. R. China
| | - Qi Zhang
- Department Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion; School of Chemistry&Chemical Engineering; Tianjin University of Technology; Tianjin 300384 P. R. China
| | - Aimin Yu
- Department Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion; School of Chemistry&Chemical Engineering; Tianjin University of Technology; Tianjin 300384 P. R. China
| | - Youquan Zhang
- Department Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion; School of Chemistry&Chemical Engineering; Tianjin University of Technology; Tianjin 300384 P. R. China
| | - Jiru Jia
- Department Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion; School of Chemistry&Chemical Engineering; Tianjin University of Technology; Tianjin 300384 P. R. China
| | - Xiujie Liu
- Department Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion; School of Chemistry&Chemical Engineering; Tianjin University of Technology; Tianjin 300384 P. R. China
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19
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Díaz JE, Ranieri S, Gruber N, Orelli LR. Syntheses of 3,4- and 1,4-dihydroquinazolines from 2-aminobenzylamine. Beilstein J Org Chem 2017; 13:1470-1477. [PMID: 28845190 PMCID: PMC5550820 DOI: 10.3762/bjoc.13.145] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 06/30/2017] [Indexed: 11/23/2022] Open
Abstract
A straightforward strategy for the synthesis of dihydroquinazolines is presented, which allows for the preparation of 3,4- and 1,4-dihydroquinazolines with different substitution patterns from 2-aminobenzylamine (2-ABA) as common precursor. The required functionalization of both amino groups present in 2-ABA was achieved by different routes involving selective N-acylation and cesium carbonate-mediated N-alkylation reactions, avoiding protection/deprotection steps. The heterocycles were efficiently synthesized in short reaction times by microwave-assisted ring closure of the corresponding aminoamides promoted by ethyl polyphosphate (PPE).
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Affiliation(s)
- Jimena E Díaz
- Universidad de Buenos Aires. CONICET. Departamento de Química Orgánica. Facultad de Farmacia y Bioquímica. Junín 956, (1113) Buenos Aires, Argentina
| | - Silvia Ranieri
- Universidad de Buenos Aires. CONICET. Departamento de Química Orgánica. Facultad de Farmacia y Bioquímica. Junín 956, (1113) Buenos Aires, Argentina
- Department of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
| | - Nadia Gruber
- Universidad de Buenos Aires. CONICET. Departamento de Química Orgánica. Facultad de Farmacia y Bioquímica. Junín 956, (1113) Buenos Aires, Argentina
| | - Liliana R Orelli
- Universidad de Buenos Aires. CONICET. Departamento de Química Orgánica. Facultad de Farmacia y Bioquímica. Junín 956, (1113) Buenos Aires, Argentina
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20
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Iron-catalyzed C sp3 C sp3 bond formation via dehydrative cross coupling reaction: Facile access to new hybrid dihydroquinazolines having quinoline, isoquinoline, quinoxaline and azoles. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.03.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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21
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Du Y, Yu A, Jia J, Zhang Y, Meng X. Direct N–H/α,α,β,β-C(sp3)–H functionalization of piperidine via an azomethine ylide route: synthesis of spirooxindoles bearing 3-substituted oxindoles. Chem Commun (Camb) 2017; 53:1684-1687. [DOI: 10.1039/c6cc08996h] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A protocol for the direct functionalization of N–H/α,α,β,β-C(sp3)–H of piperidine without any metal or external oxidants is reported.
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Affiliation(s)
- Yanlong Du
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion
- School of Chemistry & Chemical Engineering Tianjin University of Technology
- Tianjin 300384
- P. R. China
| | - Aimin Yu
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion
- School of Chemistry & Chemical Engineering Tianjin University of Technology
- Tianjin 300384
- P. R. China
| | - Jiru Jia
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion
- School of Chemistry & Chemical Engineering Tianjin University of Technology
- Tianjin 300384
- P. R. China
| | - Youquan Zhang
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion
- School of Chemistry & Chemical Engineering Tianjin University of Technology
- Tianjin 300384
- P. R. China
| | - Xiangtai Meng
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion
- School of Chemistry & Chemical Engineering Tianjin University of Technology
- Tianjin 300384
- P. R. China
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22
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Intagliata S, Modica MN, Pittalà V, Salerno L, Siracusa MA, Cagnotto A, Salmona M, Kurczab R, Romeo G. New N- and O-arylpiperazinylalkyl pyrimidines and 2-methylquinazolines derivatives as 5-HT 7 and 5-HT 1A receptor ligands: Synthesis, structure-activity relationships, and molecular modeling studies. Bioorg Med Chem 2016; 25:1250-1259. [PMID: 28063784 DOI: 10.1016/j.bmc.2016.12.039] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2016] [Revised: 12/20/2016] [Accepted: 12/23/2016] [Indexed: 11/30/2022]
Abstract
Based on our earlier studies of structure activity relationships on 4-substituted piperazine derivatives, in this work we synthesized a novel set of long-chain arylpiperazines with the purpose of elucidating if some structural modifications in the terminal fragment could affect the binding affinity for the 5-HT7 and 5-HT1A receptors. In this new series, the quinazolinone system of the previous derivatives was replaced by a 6-phenylpyrimidine or a 2-methylquinazoline, which were used as versatile building blocks for the preparation of new compounds. A 4-arylpiperazine moiety through a five methylene chain was anchored at the nitrogen or oxygen atom of the heterocyclic scaffolds. The substituents borne by the piperazine nucleus were phenyl, phenylmethyl, 3- or 4-chlorophenyl, and 2-ethoxyphenyl. Binding tests, performed on human cloned 5-HT7 and 5-HT1A receptors, showed that, among the newly synthesized derivatives, 4-[5-[4-(2-ethoxyphenyl)-1-piperazinyl]pentoxy]-6-phenyl-pyrimidine (13) and 3-[5-[4-(2-ethoxyphenyl)-1-piperazinyl]pentyl]-2-methyl-4(3H)-quinazolinone (20) displayed the best affinity values, Ki=23.5 and 8.42nM for 5-HT7 and 6.96 and 2.99nM for 5-HT1A receptors, respectively. Moreover, the functional properties for both compounds were further evaluated using the cAMP assay. Finally, a molecular modeling study has been performed for 5-HT7 and 5-HT1A receptor homology models to investigate the binding mode of N- and O-alkylated pyrimidinones/pyrimidines 4-13, 2-methylquinazolinones/quinazolines 17-22, and previously reported 2- and 3-substituted quinazolinones 23-30.
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Affiliation(s)
- Sebastiano Intagliata
- Dipartimento di Scienze del Farmaco, Università di Catania, viale A. Doria 6, Catania 95125, Italy.
| | - Maria N Modica
- Dipartimento di Scienze del Farmaco, Università di Catania, viale A. Doria 6, Catania 95125, Italy
| | - Valeria Pittalà
- Dipartimento di Scienze del Farmaco, Università di Catania, viale A. Doria 6, Catania 95125, Italy
| | - Loredana Salerno
- Dipartimento di Scienze del Farmaco, Università di Catania, viale A. Doria 6, Catania 95125, Italy
| | - Maria A Siracusa
- Dipartimento di Scienze del Farmaco, Università di Catania, viale A. Doria 6, Catania 95125, Italy
| | - Alfredo Cagnotto
- IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", via La Masa 19, Milano 20156, Italy
| | - Mario Salmona
- IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", via La Masa 19, Milano 20156, Italy
| | - Rafał Kurczab
- Department of Medicinal Chemistry, Institute of Pharmacology, Polish Academy of Sciences, 12 Smetna Street, 31-343 Krakow, Poland
| | - Giuseppe Romeo
- Dipartimento di Scienze del Farmaco, Università di Catania, viale A. Doria 6, Catania 95125, Italy
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23
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Sawatzky E, Drakopoulos A, Rölz M, Sotriffer C, Engels B, Decker M. Experimental and theoretical investigations into the stability of cyclic aminals. Beilstein J Org Chem 2016; 12:2280-2292. [PMID: 28144295 PMCID: PMC5238614 DOI: 10.3762/bjoc.12.221] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Accepted: 10/12/2016] [Indexed: 11/23/2022] Open
Abstract
Background: Cyclic aminals are core features of natural products, drug molecules and important synthetic intermediates. Despite their relevance, systematic investigations into their stability towards hydrolysis depending on the pH value are lacking. Results: A set of cyclic aminals was synthesized and their stability quantified by kinetic measurements. Steric and electronic effects were investigated by choosing appropriate groups. Both molecular mechanics (MM) and density functional theory (DFT) based studies were applied to support and explain the results obtained. Rapid decomposition is observed in acidic aqueous media for all cyclic aminals which occurs as a reversible reaction. Electronic effects do not seem relevant with regard to stability, but the magnitude of the conformational energy of the ring system and pKa values of the N-3 nitrogen atom. Conclusion: Cyclic aminals are stable compounds when not exposed to acidic media and their stability is mainly dependent on the conformational energy of the ring system. Therefore, for the preparation and work-up of these valuable synthetic intermediates and natural products, appropriate conditions have to be chosen and for application as drug molecules their sensitivity towards hydrolysis has to be taken into account.
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Affiliation(s)
- Edgar Sawatzky
- Pharmazeutische und Medizinische Chemie, Institut für Pharmazie und Lebensmittelchemie, Julius-Maximilians-Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Antonios Drakopoulos
- Pharmazeutische und Medizinische Chemie, Institut für Pharmazie und Lebensmittelchemie, Julius-Maximilians-Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Martin Rölz
- Pharmazeutische und Medizinische Chemie, Institut für Pharmazie und Lebensmittelchemie, Julius-Maximilians-Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Christoph Sotriffer
- Pharmazeutische und Medizinische Chemie, Institut für Pharmazie und Lebensmittelchemie, Julius-Maximilians-Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Bernd Engels
- Institut für Physikalische und Theoretische Chemie, Julius-Maximilians-Universität Würzburg, Emil-Fischer-Straße 42, D-97074 Würzburg, Germany
| | - Michael Decker
- Pharmazeutische und Medizinische Chemie, Institut für Pharmazie und Lebensmittelchemie, Julius-Maximilians-Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
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24
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Sreenath K, Yuan Z, Macias‐Contreras M, Ramachandran V, Clark RJ, Zhu L. Dual Role of Acetate in Copper(II) Acetate Catalyzed Dehydrogenation of Chelating Aromatic Secondary Amines: A Kinetic Case Study of Copper‐Catalyzed Oxidation Reactions. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600540] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Kesavapillai Sreenath
- Department of Chemistry and BiochemistryFlorida State University95 Chieftan Way32306‐4390TallahasseeFLUSA
| | - Zhao Yuan
- Department of Chemistry and BiochemistryFlorida State University95 Chieftan Way32306‐4390TallahasseeFLUSA
| | - Miguel Macias‐Contreras
- Department of Chemistry and BiochemistryFlorida State University95 Chieftan Way32306‐4390TallahasseeFLUSA
| | - Vasanth Ramachandran
- Department of Chemistry and BiochemistryFlorida State University95 Chieftan Way32306‐4390TallahasseeFLUSA
| | - Ronald J. Clark
- Department of Chemistry and BiochemistryFlorida State University95 Chieftan Way32306‐4390TallahasseeFLUSA
| | - Lei Zhu
- Department of Chemistry and BiochemistryFlorida State University95 Chieftan Way32306‐4390TallahasseeFLUSA
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25
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Mechanistic insights into a catalyst-free method to construct quinazolinones through multiple oxidative cyclization. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.01.027] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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26
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Arun Kumar R, Srinivasulu A, Saidulu G, Santhosh Kumar P, Sridhar B, Rajender Reddy K. Iron-catalyzed C–C bond formation via cross dehydrative coupling reaction of N-heterocyclic aminols with electron rich arenes: facile access to C4-aryl-dihydroquinazolines. Tetrahedron 2016. [DOI: 10.1016/j.tet.2015.12.040] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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27
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Progress in Studies on Rutaecarpine. II.--Synthesis and Structure-Biological Activity Relationships. Molecules 2015; 20:10800-21. [PMID: 26111170 PMCID: PMC6272352 DOI: 10.3390/molecules200610800] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Revised: 05/27/2015] [Accepted: 06/01/2015] [Indexed: 12/24/2022] Open
Abstract
Rutaecarpine is a pentacyclic indolopyridoquinazolinone alkaloid found in Evodia rutaecarpa and other related herbs. It has a variety of intriguing biological properties, which continue to attract the academic and industrial interest. Studies on rutaecarpine have included isolation from new natural sources, development of new synthetic methods for its total synthesis, the discovery of new biological activities, metabolism, toxicology, and establishment of analytical methods for determining rutaecarpine content. The present review focuses on the synthesis, biological activities, and structure-activity relationships of rutaecarpine derivatives, with respect to their antiplatelet, vasodilatory, cytotoxic, and anticholinesterase activities.
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28
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Seidel D. The azomethine ylide route to amine C-H functionalization: redox-versions of classic reactions and a pathway to new transformations. Acc Chem Res 2015; 48:317-28. [PMID: 25560649 PMCID: PMC4334269 DOI: 10.1021/ar5003768] [Citation(s) in RCA: 188] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
![]()
Redox-neutral
methods for the functionalization of amine α-C–H
bonds are inherently efficient because they avoid external oxidants
and reductants and often do not generate unwanted byproducts. However,
most of the current methods for amine α-C–H bond functionalization
are oxidative in nature. While the most efficient variants utilize
atmospheric oxygen as the terminal oxidant, many such transformations
require the use of expensive or toxic oxidants, often coupled with
the need for transition metal catalysts. Redox-neutral amine
α-functionalizations that involve intramolecular
hydride transfer steps provide viable alternatives to certain oxidative
reactions. These processes have been known for some time and are particularly
well suited for tertiary amine substrates. A mechanistically distinct
strategy for secondary amines has emerged only recently, despite sharing
common features with a range of classic organic transformations. Among
those are such widely used reactions as the Strecker, Mannich, Pictet–Spengler,
and Kabachnik–Fields reactions, Friedel–Crafts alkylations,
and iminium alkynylations. In these classic processes, condensation
of a secondary amine with an aldehyde (or a ketone) typically leads
to the formation of an intermediate iminium ion, which is subsequently
attacked by a nucleophile. The corresponding redox-versions of these
transformations utilize identical starting materials but incorporate
an isomerization step that enables α-C–H bond functionalization.
Intramolecular versions of these reactions include redox-neutral amine α-amination,
α-oxygenation, and α-sulfenylation. In all cases, a reductive
N-alkylation is effectively combined with an oxidative α-functionalization,
generating water as the only byproduct. Reactions are promoted
by simple carboxylic acids and in some cases
require no additives. Azomethine ylides, dipolar species whose usage
is predominantly in [3 + 2] cycloadditions and other pericyclic processes,
have been identified as common intermediates. Extension of this chemistry
to amine α,β-difunctionalization has been shown to be
possible by way of converting the intermediate azomethine ylides into
transient enamines. This Account details the evolution of this
general strategy and
the progress made to date. Further included is a discussion of related
decarboxylative reactions and transformations that result in the redox-neutral
aromatization of (partially) saturated cyclic amines. These processes
also involve azomethine ylides, reactive intermediates that appear
to be far more prevalent in condensation chemistry of amines and carbonyl
compounds than previously considered. In contrast, as exemplified
by some redox transformations that have been studied in greater detail,
iminium ions are not necessarily involved in all amine/aldehyde condensation
reactions.
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Affiliation(s)
- Daniel Seidel
- Department of Chemistry and
Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
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29
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Tricyclic Quinazoline Alkaloids: Isolation, Synthesis, Chemical Modification, and Biological Activity. Chem Nat Compd 2014. [DOI: 10.1007/s10600-014-1086-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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30
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Jarvis CL, Richers MT, Breugst M, Houk KN, Seidel D. Redox-neutral α-sulfenylation of secondary amines: ring-fused N,S-acetals. Org Lett 2014; 16:3556-9. [PMID: 24927364 PMCID: PMC4096192 DOI: 10.1021/ol501509b] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
![]()
Secondary amines react with thiosalicylaldehydes
in the presence
of catalytic amounts of acetic acid to generate ring-fused N,S-acetals in redox-neutral fashion. A
broad range of amines undergo α-sulfenylation, including challenging
substrates such morpholine, thiomorpholine, and piperazines. Computational
studies employing density functional theory indicate that acetic acid
reduces the energy barriers of two separate steps, both of which involve
proton transfer.
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Affiliation(s)
- Claire L Jarvis
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey , Piscataway, New Jersey 08854, United States
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31
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Min C, Sanchawala A, Seidel D. Dual C-H functionalization of N-aryl amines: synthesis of polycyclic amines via an oxidative Povarov approach. Org Lett 2014; 16:2756-9. [PMID: 24786302 PMCID: PMC4033637 DOI: 10.1021/ol501073f] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2014] [Indexed: 12/25/2022]
Abstract
Iminium ions generated in situ via copper(I) bromide catalyzed oxidation of N-aryl amines readily undergo [4 + 2] cycloadditions with a range of dienophiles. This method involves the functionalization of both a C(sp(3))-H and a C(sp(2))-H bond and enables the rapid construction of polycyclic amines under relatively mild conditions.
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Affiliation(s)
- Chang Min
- Department of Chemistry and
Chemical Biology, Rutgers, The State University
of New Jersey, Piscataway, New Jersey 08854, United States
| | - Abbas Sanchawala
- Department of Chemistry and
Chemical Biology, Rutgers, The State University
of New Jersey, Piscataway, New Jersey 08854, United States
| | - Daniel Seidel
- Department of Chemistry and
Chemical Biology, Rutgers, The State University
of New Jersey, Piscataway, New Jersey 08854, United States
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32
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Richers M, Breugst M, Platonova AY, Ullrich A, Dieckmann A, Houk KN, Seidel D. Redox-neutral α-oxygenation of amines: reaction development and elucidation of the mechanism. J Am Chem Soc 2014; 136:6123-35. [PMID: 24689802 PMCID: PMC4333595 DOI: 10.1021/ja501988b] [Citation(s) in RCA: 113] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Indexed: 12/19/2022]
Abstract
Cyclic secondary amines and 2-hydroxybenzaldehydes or related ketones react to furnish benzo[e][1,3]oxazine structures in generally good yields. This overall redox-neutral amine α-C-H functionalization features a combined reductive N-alkylation/oxidative α-functionalization and is catalyzed by acetic acid. In contrast to previous reports, no external oxidants or metal catalysts are required. Reactions performed under modified conditions lead to an apparent reductive amination and the formation of o-hydroxybenzylamines in a process that involves the oxidation of a second equivalent of amine. A detailed computational study employing density functional theory compares different mechanistic pathways and is used to explain the observed experimental findings. Furthermore, these results also reveal the origin of the catalytic efficiency of acetic acid in these transformations.
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Affiliation(s)
- Matthew
T. Richers
- Department
of Chemistry and Chemical Biology, Rutgers,
The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Martin Breugst
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, California 90095, United States
- Department
für Chemie, Universität zu
Köln, Greinstraße
4, 50939 Köln, Germany
| | - Alena Yu. Platonova
- Department
of Chemistry and Chemical Biology, Rutgers,
The State University of New Jersey, Piscataway, New Jersey 08854, United States
- Department
of Organic Synthesis Technology, Ural Federal
University, Yekaterinburg 620002, Russia
| | - Anja Ullrich
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, California 90095, United States
- Institut
für Bioorganische Chemie, Heinrich-Heine
Universität Düsseldorf, Stetternicher Forst, 52426 Jülich, Germany
| | - Arne Dieckmann
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, California 90095, United States
| | - K. N. Houk
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, California 90095, United States
| | - Daniel Seidel
- Department
of Chemistry and Chemical Biology, Rutgers,
The State University of New Jersey, Piscataway, New Jersey 08854, United States
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33
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Sun J, Tan Q, Yang W, Liu B, Xu B. Copper-Catalyzed Aerobic Oxidative Annulation and Carbon-Carbon Bond Cleavage of Arylacetamides: Domino Synthesis of Fused Quinazolinones. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201300818] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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34
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Abstract
The new routes and strategies for the synthesis of valuable 4(3H)-quinazolinones have been summarized.
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Affiliation(s)
- Lin He
- Leibniz-Institut für Katalyse e.V
- 18059 Rostock, Germany
| | - Haoquan Li
- Leibniz-Institut für Katalyse e.V
- 18059 Rostock, Germany
| | - Jianbin Chen
- Leibniz-Institut für Katalyse e.V
- 18059 Rostock, Germany
| | - Xiao-Feng Wu
- Leibniz-Institut für Katalyse e.V
- 18059 Rostock, Germany
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